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Finding the Third Proportional to 278 and 365.75

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Solution

The third proportional to 278 and 365.75 is: 481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278 : 365.75 = 365.75 : x
  2. Step 2: Convert to fraction form
    278/365.75 = 365.75/x
  3. Step 3: Cross multiply
    278x = 365.75 × 365.75
  4. Step 4: Simplify right side
    278x = 133,773.06
  5. Step 5: Solve for x
    x = 133,773.06/278
  6. Step 6: Final answer
    x = 481.20

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These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.